At this point I’d encourage you to join the discord so I can take a look at your save.
Because if you’re not lying, you found a really weird edge case.
The apartment won’t be on fire after you take out the fire elemental child, and you can’t finish Roxy’s story without doing that.
And we won’t be going past the bridge any time soon, it seems like Arc is going to cover the outskirts first.
Who knows if we’ll get to Morgana before crossing the river.